import Vue from 'vue'
import VueRouter from 'vue-router'

import Login from '../components/Login.vue'
import Home from '../components/Home.vue'
import Welcome from '../components/Welcome.vue'
import Users from '../components/user/Users.vue'

Vue.use(VueRouter)

const routes = [
  // component: () => import(/* webpackChunkName: "about" */ '../views/About.vue')
  {
    path:'/',
    redirect: '/login'
  },
  {
    path:'/login',
    component: Login
  },
  {
    path:'/home',
    component: Home,
    redirect: '/welcome',
    children:[
      {
        path:'/welcome',
        component: Welcome
      },
      {
        path:'/users',
        component:Users
      }
    ]
  }
]

const router = new VueRouter({
  routes
})

//挂载路由导航守卫
router.beforeEach((to, from, next) =>{
  // to 将要访问的路径，form代表从哪个路径跳转而来，next() 放行， next('/login') 强制跳转
  if(to.path === '/login') return next();
  //获取token
  const tokenStr = window.sessionStorage.getItem('token')
  if(!tokenStr) return next('/login')
  next()
})

export default router
